diff --git a/murano/db/models.py b/murano/db/models.py
index ed87fc47..45710579 100644
--- a/murano/db/models.py
+++ b/murano/db/models.py
@@ -56,6 +56,8 @@ Base = declarative.declarative_base(cls=_MuranoBase)
 class Environment(Base, TimestampMixin):
     """Represents a Environment in the metadata-store."""
     __tablename__ = 'environment'
+    __table_args__ = (sa.Index(
+        'ix_name_tenant_id', 'name', 'tenant_id', unique=True),)
 
     id = sa.Column(sa.String(255),
                    primary_key=True,